[go: up one dir, main page]

WO1996007841A1 - Light-metal piston for highly stressed internal combustion engines - Google Patents

Light-metal piston for highly stressed internal combustion engines Download PDF

Info

Publication number
WO1996007841A1
WO1996007841A1 PCT/DE1995/001064 DE9501064W WO9607841A1 WO 1996007841 A1 WO1996007841 A1 WO 1996007841A1 DE 9501064 W DE9501064 W DE 9501064W WO 9607841 A1 WO9607841 A1 WO 9607841A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
bore
light metal
widening
partial area
Prior art date
Application number
PCT/DE1995/001064
Other languages
German (de)
French (fr)
Inventor
Wolfgang Issler
Helmut Kollotzek
Original Assignee
Mahle Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE4431990A external-priority patent/DE4431990A1/en
Application filed by Mahle Gmbh filed Critical Mahle Gmbh
Priority to EP95928418A priority Critical patent/EP0779954B1/en
Priority to US08/776,069 priority patent/US5746169A/en
Priority to JP50908896A priority patent/JP3909085B2/en
Priority to DE59505005T priority patent/DE59505005D1/en
Publication of WO1996007841A1 publication Critical patent/WO1996007841A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/26—Pistons  having combustion chamber in piston head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a light metal piston for highly loaded internal combustion engines according to the preamble of claim 1.
  • Fig. 1 a light metal piston according to the invention in side view, partly in section
  • FIG. 2 is a plan view in section II-II of FIG. 1st
  • a light metal piston 1 for an internal combustion engine in particular a highly loaded diesel engine for a motor vehicle, consists in one piece of a piston head 2 and a piston shaft 3.
  • An unreinforced combustion chamber bowl 5 and annular grooves 6 are formed in a piston crown 4 of the piston head 2, the top annular groove 6 is reinforced with a ring carrier 7.
  • the piston pin hubs 8 are integrated, which have bores 9 for receiving a piston pin (not shown).
  • Each bore 9 is widened (cambered) at its inner end 10 in a partial region X towards the inner end, the curvature of this widening being able to be designed as a polygon.
  • the bore 9 is designed in a partial area Z as a shaped bore 11, which extends from the inside to the corresponding partial area Z in the area that runs from the outside inward to the load-bearing area — which is delimited on the outside by the groove for the locking ring of the piston pin widened conically on the outside, eg trumpet-shaped.
  • the expansion takes place at an angle alpha of 5 minutes.
  • the widening, which is to move at an angle of 2-10 minutes, can also be step-like, the widening in the inner region Z of the shaped bore 11 being a smaller angle than in the further outer region of the shaped bore 11 should have.
  • the bore 9 has a cylindrical area Y.
  • two oblique pocket-shaped recesses (pockets 12) extending from the inner end 10 of the bore 9 are formed in the bore 9 of each piston pin hub 8 and are asymmetrical with respect to the longitudinal axis of the piston pin with respect to their height, have their greatest depth at the inner end 10 of the bore 9 and after about 2/3 of the length of the bore 9 run into the surface of the shaped bore 11.
  • a connection between the oblique pockets 12 and the end of the bore 9 on the outside of the piston forms in each case a Groove pin longitudinal axis 13.
  • a light metal piston is created in a structurally simple manner, which guarantees an improvement in particular with regard to hub strength.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

In a light-metal piston for highly stressed internal combustion engines with a combustion chamber in the piston head, in order to keep the stresses at the edge of the combustion chamber low without unnecessarily increasing the stresses in the support and the gudgeon pin boss, the following features are provided in combination: the combustion chamber (5) in the piston head (4) is not reinforced; the drilling (9) of each gudgeon pin boss (8) is widened (crowned) at and towards its inner end (10) at least in a partial region X of its entire length; the drilling (9) in each gudgeon pin boss (8) is a shaped drilling (11) widening conically from the inside to the outside at least in a partial region Z; the drilling (9) of each gudgeon pin boss (8) has two oblique wells (12) running from its inner end (10).

Description

Leichtmetallkolben für hochbelastete Verbrennungsmotoren Light alloy pistons for highly loaded internal combustion engines
Die Erfindung betrifft einen Leichtmetallkolben für hochbe¬ lastete Verbrennungsmotoren nach dem Oberbegriff des An¬ spruchs 1.The invention relates to a light metal piston for highly loaded internal combustion engines according to the preamble of claim 1.
Die DE-OS 43 27 772, die bezüglich des PrioritatsZeitpunk¬ tes dieser Anmeldung nicht vorveröffentlicht ist, geht von folgendem Stand der Technik aus. Bei aus der Praxis bekann¬ ten Leichtmetallkolben sind - um die mechanischen, durch den Zünddruck hervorgerufenen Belastungen aushalten zu kön¬ nen - verschiedene Vorkehrungen getroffen worden, um einer¬ seits insbesondere die Durchbiegung des Kolbenbolzens, die zu Rissen in den Kolbenbolzennaben führen kann, zu verrin¬ gern und andererseits die Brennraummulde gegen Anrisse zu schützen. Hierzu werden derartige Leichtmetallkolben bei¬ spielsweise mit Buchsen in den Bohrungen der Kolbenbolzen¬ naben und die Brennraummulde mit einer zusätzlichen Beweh¬ rung versehen.DE-OS 43 27 772, which has not been previously published with regard to the priority date of this application, is based on the following prior art. In light-alloy pistons known from practice - in order to be able to withstand the mechanical loads caused by the ignition pressure - various precautions have been taken, in particular to prevent the piston pin from deflecting, which can lead to cracks in the piston pin hubs reduce and on the other hand to protect the combustion chamber bowl against cracks. For this purpose, such light metal pistons are provided, for example, with bushings in the bores of the piston pin hubs and the combustion chamber trough with additional reinforcement.
Aus der DE-PS 36 09 019 ist zur Vermeidung von Nabenanris¬ sen bekannt, in die Nabenbohrungen jeweils beidseitig ta- schenförmige Ausnehmungen vom inneren Ende der Nabenbohrun¬ gen her einzubringen, die sich über eine gewisse Länge in Nabenbohrungslängsrichtung erstrecken. Eine Verbindung zwi¬ schen diesen Ausnehmungen und dem kolbenaußenseitigen Ende der Nabenbohrung wird durch entsprechende Nuten in den Na¬ benbohrungen sichergestellt. Vorliegende Erfindung beschäftigt sich mit dem Problem, die Ausführung gemäß der DE-OS 43 27 772 zu verbessern.From DE-PS 36 09 019 it is known, to avoid hub tears, to make pocket-shaped recesses on both sides of the hub bores from the inner end of the hub bores, which extend over a certain length in the longitudinal direction of the hub bore. A connection between these recesses and the piston-outside end of the hub bore is ensured by corresponding grooves in the hub bores. The present invention is concerned with the problem of improving the design according to DE-OS 43 27 772.
Gelöst wird dieses Problem mit einem Leichtmetallkolben mit den Merkmalen nach dem Kennzeichen des Anspruchs 1.This problem is solved with a light metal piston with the features according to the characterizing part of claim 1.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Un¬ teransprüchen enthalten.Advantageous embodiments of the invention are contained in the subclaims.
Die Erfindung ist anhand eines bevorzugten, in der Zeich¬ nung dargestellten Ausführungsbeispiels näher erläutert.The invention is explained in more detail with the aid of a preferred exemplary embodiment shown in the drawing.
Es zeigenShow it
Fig. 1 einen erfindungsgemäßen Leicht¬ metallkolben in Seitenansicht teilweise im SchnittFig. 1 a light metal piston according to the invention in side view, partly in section
Fig. 2 eine Draufsicht im Schnitt II-II nach Fig. 12 is a plan view in section II-II of FIG. 1st
Ein Leichtmetallkolben 1 für einen Verbrennungsmotor, ins¬ besondere hochbelasteter Dieselmotor für ein Kraftfahrzeug, besteht einstückig aus einem Kolbenkopf 2 und einem Kolben¬ schaft 3. In einem Kolbenboden 4 des Kolbenkopfes 2 sind eine unbewehrte Brennraummulde 5 sowie Ringnuten 6 einge¬ formt, wobei die oberste Ringnut 6 mit einem Ringträger 7 bewehrt ist. In den Kolbenschaft 3 sind die Kolbenbolzenna¬ ben 8 integriert, die zur Aufnahme eines Kolbenbolzens (nicht gezeichnet) Bohrungen 9 aufweisen. Jede Bohrung 9 ist an ihrem inneren Ende 10 in einem Teilbereich X zum in¬ neren Ende hin aufgeweitet (bombiert), wobei die Krümmung dieser Aufweitung als Polygon ausgebildet sein kann. Der Übergang dieser Aufweitung in die Stirnfläche der Nabe er¬ folgt mit einem Radius von 3 mm, wobei die axiale Länge der Ausrundung in Kolbenbolzenlängsrichtung 1 mm bei einem Kol¬ ben mit einem Durchmesser von 80 mm beträgt. Außerdem ist die Bohrung 9 in einem Teilbereich Z als Formbohrung 11 ausgeführt, die sich in dem von außen nach innen verlaufen¬ den, dem tragenden Bereich - der nach außen durch die Nut für den Sicherungsring des Kolbenbolzens begrenzt wird - entsprechenden Teilbereich Z von innen nach außen konisch aufweitet, z.B. trompetenförmig. Die Aufweitung (in der Zeichnung übertrieben groß dargestellt) erfolgt unter einem Winkel Alpha von 5 Minuten. Die Aufweitung, die sich in ei¬ nem Winkel von 2 - 10 Minuten bewegen soll, kann auch stu¬ fenförmig erfolgen, wobei die Aufweitung im weiter innen liegenden Teilbereich Z der Formbohrung 11 einen kleineren Winkel als im weiter außen liegenden Bereich der Formboh¬ rung 11 aufweisen soll.A light metal piston 1 for an internal combustion engine, in particular a highly loaded diesel engine for a motor vehicle, consists in one piece of a piston head 2 and a piston shaft 3. An unreinforced combustion chamber bowl 5 and annular grooves 6 are formed in a piston crown 4 of the piston head 2, the top annular groove 6 is reinforced with a ring carrier 7. In the piston skirt 3, the piston pin hubs 8 are integrated, which have bores 9 for receiving a piston pin (not shown). Each bore 9 is widened (cambered) at its inner end 10 in a partial region X towards the inner end, the curvature of this widening being able to be designed as a polygon. The This widening transition into the end face of the hub takes place with a radius of 3 mm, the axial length of the rounding in the longitudinal direction of the piston pin being 1 mm for a piston with a diameter of 80 mm. In addition, the bore 9 is designed in a partial area Z as a shaped bore 11, which extends from the inside to the corresponding partial area Z in the area that runs from the outside inward to the load-bearing area — which is delimited on the outside by the groove for the locking ring of the piston pin widened conically on the outside, eg trumpet-shaped. The expansion (exaggerated in the drawing) takes place at an angle alpha of 5 minutes. The widening, which is to move at an angle of 2-10 minutes, can also be step-like, the widening in the inner region Z of the shaped bore 11 being a smaller angle than in the further outer region of the shaped bore 11 should have.
Zwischen der sich nach außen konisch aufweitenden Formboh¬ rung 11 im Teilbereich Z und der am inneren Ende 10 im Teilbereich X der Bohrung vorgesehenen Aufweitung (Bombie¬ rung) weist die Bohrung 9 einen zylindrisch verlaufenden Bereich Y auf.Between the outwardly conically widening shaped bore 11 in the partial area Z and the widening (bombardment) provided at the inner end 10 in the partial area X of the bore, the bore 9 has a cylindrical area Y.
Weiterhin sind in die Bohrung 9 jeder Kolbenbolzennabe 8 zwei vom inneren Ende 10 der Bohrung 9 ausgehende schräge taschenförmige Ausnehmungen (Taschen 12) eingeformt, die bezüglich ihrer Höhenlage unsymmetrisch zur Kolbenbolzen¬ längsachse liegen, ihre größte Tiefe am inneren Ende 10 der Bohrung 9 aufweisen und nach etwa 2/3 der Länge der Bohrung 9 in die Oberfläche der Formbohrung 11 auslaufen. Eine Ver¬ bindung zwischen den schrägen Taschen 12 und dem kolbenau¬ ßenseitigen Ende der Bohrung 9 bildet jeweils eine in Kol- benbolzenlängsachse verlaufende Nut 13.In addition, two oblique pocket-shaped recesses (pockets 12) extending from the inner end 10 of the bore 9 are formed in the bore 9 of each piston pin hub 8 and are asymmetrical with respect to the longitudinal axis of the piston pin with respect to their height, have their greatest depth at the inner end 10 of the bore 9 and after about 2/3 of the length of the bore 9 run into the surface of the shaped bore 11. A connection between the oblique pockets 12 and the end of the bore 9 on the outside of the piston forms in each case a Groove pin longitudinal axis 13.
Mit einer derartigen Ausführung wird auf konstruktiv einfa¬ che Weise ein Leichtmetallkolben geschaffen, der insbeson¬ dere bezüglich Nabenfestigkeit eine Verbesserung gewährlei¬ stet. With an embodiment of this type, a light metal piston is created in a structurally simple manner, which guarantees an improvement in particular with regard to hub strength.

Claims

Patentansprüche claims
Leichtmetallkolben für hochbelastete Verbrennungsmoto¬ ren, bestehend aus einem den Kolbenboden mit Brennraum¬ mulde und die Ringnutenpartie aufnehmenden Kolbenkopf und einem Kolbenschaft mit integrierten Kolbenbolzenna¬ ben, der in Kombination folgende Merkmale aufweist:Light metal pistons for highly loaded internal combustion engines, consisting of a piston head that receives the piston crown with the combustion chamber recess and the annular groove section and a piston skirt with integrated piston pin hubs, which in combination has the following features:
a) die Brennraummulde (5) im Kolbenboden (4) ist unbewehrta) the combustion chamber trough (5) in the piston crown (4) is not reinforced
b) die Bohrung (9) jeder Kolbenbolzennabe (8) ist wenigstens in einem Teilbereich X der gesamten Nabenbohrungslänge an ihrem inneren Ende (10) zum inneren Ende hin aufgeweitet (bombiert)b) the bore (9) of each piston pin hub (8) is widened (cambered) at least in a partial area X of the entire hub bore length at its inner end (10) towards the inner end
c) die Bohrung (9) jeder Kolbenbolzennabe (8) ist als Formbohrung (11) ausgeführt, die sich wenigstens in einem von außen nach in¬ nen verlaufenden, dem tragenden Bereich ent¬ sprechenden Teilbereich Z der gesamten Na¬ benbohrungslänge von innen nach außen im we¬ sentlichen konisch erweitert d) die Bohrung (9) jeder Kolbenbolzennabe (8) weist mindestens eine von ihrem inneren Ende (10) ausgehende schräge Tasche (12) aufc) the bore (9) of each piston pin hub (8) is designed as a shaped bore (11), which extends from the inside to the outside at least in a partial area Z of the total hub bore length that runs from the outside inwards and corresponds to the supporting area essentially expanded conically d) the bore (9) of each piston pin hub (8) has at least one oblique pocket (12) extending from its inner end (10)
e) der bei der Verbrennung entstehende Zünd¬ druck ist größer als 120 bar,e) the ignition pressure arising during combustion is greater than 120 bar,
dadurch gekennzeichnet, daß in jeder Kolbenbolzennabe (8) zwei schräge Taschencharacterized in that in each piston pin hub (8) two oblique pockets
(12) vorgesehen sind.(12) are provided.
2. Leichtmetallkolben nach Anspruch 1, dadurch gekennzeichnet, daß die Krümmung der Aufweitung im Teilbereich X am in¬ neren Ende (10) als Polygon ausgebildet ist.2. Light metal piston according to claim 1, characterized in that the curvature of the widening in the partial area X at the inner end (10) is designed as a polygon.
3. Leichtmetallkolben nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Bohrung (9) der Kolbenbolzennabe (8) im Teilbe¬ reich Z von innen nach außen trompetenförmig aufgewei¬ tet ist.3. Light metal piston according to claim 1 or 2, characterized in that the bore (9) of the piston pin hub (8) in part Z is trumpet-shaped from the inside to the outside.
4. Leichtmetallkolben nach einem der vorhergehenden An¬ sprüche, dadurch gekennzeichnet, daß die Bohrung (9) der Kolbenbolzennabe (8) im Teilbe¬ reich Z eine Aufweitung mit einem Winkel Alpha von 2 - 10 Minuten aufweist. 4. Light metal piston according to one of the preceding claims, characterized in that the bore (9) of the piston pin hub (8) in the partial area Z has a widening with an angle alpha of 2-10 minutes.
5. Leichtmetallkolben nach einem der vorhergehenden An¬ sprüche, dadurch gekennzeichnet, daß die Aufweitung der Bohrung (9) der Kolbenbolzennabe5. Light metal piston according to one of the preceding claims, characterized in that the widening of the bore (9) of the piston pin hub
(8) im Teilbereich Z stufenförmig erfolgt.(8) takes place in a step-like manner in the partial area Z.
6. Leichtmetallkolben nach Anspruch 5, dadurch gekennzeichnet, daß die Aufweitung der Bohrung (9) der Kolbenbolzennabe (8) im Teilbereich Z innen einen kleineren Winkel als die weiter außen gelegene Aufweitung aufweist.6. Light metal piston according to claim 5, characterized in that the widening of the bore (9) of the piston pin hub (8) in the partial area Z has a smaller angle than the widening located further outside.
7. Leichtmetallkolben nach Anspruch 6, dadurch gekennzeichnet, daß die im Teilbereich Z gelegene innere Aufweitung ei¬ nen Winkel von 2 - 4 Minuten und die äußere Aufweitung einen Winkel von 5 - 10 Minuten aufweist.7. Light metal piston according to claim 6, characterized in that the inner widening located in partial area Z has an angle of 2-4 minutes and the outer widening has an angle of 5-10 minutes.
8. Leichtmetallkolben nach einem der vorhergehenden An¬ sprüche, dadurch gekennzeichnet, daß die Bohrung (9) zwischen der im wesentlichen sich konisch nach außen erweiternden Formbohrung (11) im Teilbereich Z und der an ihrem inneren Ende (10) im Teilbereich X vorgesehenen Aufweitung einen zylindri¬ schen Bereich Y aufweist.8. Light metal piston according to one of the preceding claims, characterized in that the bore (9) between the substantially conically widening outwardly shaped bore (11) in the partial area Z and the widening provided at its inner end (10) in the partial area X. has a cylindrical area Y.
9. Leichtmetallkolben nach einem der vorhergehenden An¬ sprüche, dadurch gekennzeichnet, daß die größte Tiefe der schrägen Tasche (12) am inne¬ ren Ende (10) der Kolbenbolzennabe (8) liegt. 9. Light metal piston according to one of the preceding claims, characterized in that the greatest depth of the oblique pocket (12) at the inner end (10) of the piston pin hub (8) is.
10. Leichtmetallkolben nach einem der vorhergehenden An¬ sprüche, dadurch gekennzeichnet, daß die schräge Tasche (12) unter einem Winkel von 2 - 5 Grad zu einer Ebene parallel zur Kolbenbolzenlängs¬ achse eingeformt ist.10. Light metal piston according to one of the preceding claims, characterized in that the oblique pocket (12) is formed at an angle of 2-5 degrees to a plane parallel to the piston pin longitudinal axis.
11. Leichtmetallkolben nach einem der vorhergehenden An¬ sprüche, dadurch gekennzeichnet, daß die schräge Tasche (12) bezüglich ihrer Höhenlage unsymmetrisch zur Kolbenbolzenlängsachse angeordnet ist. 11. Light metal piston according to one of the preceding claims, characterized in that the inclined pocket (12) is arranged asymmetrically with respect to its longitudinal position with respect to the longitudinal axis of the piston pin.
PCT/DE1995/001064 1994-09-08 1995-08-07 Light-metal piston for highly stressed internal combustion engines WO1996007841A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP95928418A EP0779954B1 (en) 1994-09-08 1995-08-07 Light-metal piston for highly stressed internal combustion engines
US08/776,069 US5746169A (en) 1994-09-08 1995-08-07 Light-metal piston for highly stressed internal combustion engines
JP50908896A JP3909085B2 (en) 1994-09-08 1995-08-07 Light metal pistons for high load internal combustion engines
DE59505005T DE59505005D1 (en) 1994-09-08 1995-08-07 LIGHT METAL PISTON FOR HIGH-LOAD COMBUSTION ENGINES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4431990.8 1994-09-08
DE4431990A DE4431990A1 (en) 1993-08-18 1994-09-08 Light metal piston for high power IC engine

Publications (1)

Publication Number Publication Date
WO1996007841A1 true WO1996007841A1 (en) 1996-03-14

Family

ID=6527711

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001064 WO1996007841A1 (en) 1994-09-08 1995-08-07 Light-metal piston for highly stressed internal combustion engines

Country Status (5)

Country Link
US (1) US5746169A (en)
EP (1) EP0779954B1 (en)
JP (1) JP3909085B2 (en)
DE (1) DE59505005D1 (en)
WO (1) WO1996007841A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007073720A1 (en) 2005-12-21 2007-07-05 Mahle International Gmbh Connecting rod for an internal combustion engine, and method for its production
WO2007076813A1 (en) 2005-12-21 2007-07-12 Mahle International Gmbh Piston for an internal combustion engine and method for its production
DE102006015586A1 (en) * 2006-04-04 2007-10-11 Mahle International Gmbh Bolts hubs of a piston for an internal combustion engine
DE102006020795A1 (en) * 2006-05-03 2007-11-08 Mahle International Gmbh Method for applying a bearing surface onto a work piece using a prepared sheet material secured by adhesive
WO2008080543A1 (en) 2006-12-29 2008-07-10 Mahle International Gmbh Piston pin for a combustion engine and method for its manufacture
DE102007060473A1 (en) * 2007-12-14 2009-06-18 Mahle International Gmbh Bolts hub and provided therewith piston for an internal combustion engine

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5906182A (en) * 1997-03-25 1999-05-25 General Motors Corporation Engine piston
JP3548451B2 (en) * 1999-02-22 2004-07-28 本田技研工業株式会社 Pin hole structure of piston
GB0015689D0 (en) * 2000-06-28 2000-08-16 Federal Mogul Technology Ltd Manufacturing pistons
DE10222463A1 (en) * 2002-05-22 2003-12-04 Mahle Gmbh Piston pin bearing for internal combustion engines
US8276563B2 (en) * 2002-06-28 2012-10-02 Cummins, Inc. Internal combustion engine piston
DE10231233A1 (en) * 2002-07-11 2004-02-05 Mahle Gmbh Pistons for an internal combustion engine
US6935301B2 (en) * 2003-12-01 2005-08-30 International Engine Intellectual Property Company, Llc Combustion chamber
DE102004008097A1 (en) * 2004-02-18 2005-09-08 Mahle Gmbh Piston pin bearing for pistons of an internal combustion engine
JP2009506259A (en) * 2005-08-29 2009-02-12 カーエス コルベンシュミット ゲゼルシャフト ミット ベシュレンクテル ハフツング Lightweight piston
DE102005041907A1 (en) * 2005-09-03 2007-03-08 Ks Kolbenschmidt Gmbh Bleeding pin bore geometry for a piston of an internal combustion engine
DE102006055726A1 (en) * 2006-11-25 2008-05-29 Mahle International Gmbh Piston for an internal combustion engine
US7845269B2 (en) * 2007-04-10 2010-12-07 Federal-Mogul Worldwide, Inc. Piston with pin bore lubrication features
DE102012022913A1 (en) * 2012-11-23 2014-05-28 Mahle International Gmbh Piston for an internal combustion engine
DE102013215538B4 (en) * 2013-08-07 2015-02-19 Federal-Mogul Nürnberg GmbH Piston for an internal combustion engine
DE102015220261A1 (en) * 2015-10-19 2017-04-20 Mahle International Gmbh piston
US10184388B1 (en) * 2015-11-30 2019-01-22 Caterpillar Inc. Engine piston

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357318A (en) * 1965-09-13 1967-12-12 Int Harvester Co Piston
FR2157319A5 (en) * 1971-10-21 1973-06-01 Schmidt Gmbh Karl
DE3036062A1 (en) * 1980-09-25 1982-04-08 Karl Schmidt Gmbh, 7107 Neckarsulm Piston for IC engine - has bearing for gudgeon pin profiled to reduce stresses in operation
DE3301366A1 (en) * 1983-01-18 1984-07-19 Karl Schmidt Gmbh, 7107 Neckarsulm Piston for internal combustion engines
DE3609019C1 (en) * 1986-03-18 1987-09-10 Mahle Gmbh Method for the production of the hub hole of a trunk piston, particularly for internal combustion engines
DE4327772A1 (en) * 1993-08-18 1995-02-23 Mahle Gmbh Light alloy pistons for highly loaded internal combustion engines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000676A (en) * 1958-06-12 1961-09-19 Gould National Batteries Inc Heavy duty pistons
JPH0750049Y2 (en) * 1986-11-25 1995-11-15 イズミ工業株式会社 Strut for thermal expansion suppression piston
US5111737A (en) * 1991-04-08 1992-05-12 Carrier Corporation Wrist pin retainer for blind assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357318A (en) * 1965-09-13 1967-12-12 Int Harvester Co Piston
FR2157319A5 (en) * 1971-10-21 1973-06-01 Schmidt Gmbh Karl
DE3036062A1 (en) * 1980-09-25 1982-04-08 Karl Schmidt Gmbh, 7107 Neckarsulm Piston for IC engine - has bearing for gudgeon pin profiled to reduce stresses in operation
DE3301366A1 (en) * 1983-01-18 1984-07-19 Karl Schmidt Gmbh, 7107 Neckarsulm Piston for internal combustion engines
DE3609019C1 (en) * 1986-03-18 1987-09-10 Mahle Gmbh Method for the production of the hub hole of a trunk piston, particularly for internal combustion engines
DE4327772A1 (en) * 1993-08-18 1995-02-23 Mahle Gmbh Light alloy pistons for highly loaded internal combustion engines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007073720A1 (en) 2005-12-21 2007-07-05 Mahle International Gmbh Connecting rod for an internal combustion engine, and method for its production
WO2007076813A1 (en) 2005-12-21 2007-07-12 Mahle International Gmbh Piston for an internal combustion engine and method for its production
US8181623B2 (en) 2005-12-21 2012-05-22 Mahle International Gmbh Piston for an internal combustion engine
US9726223B2 (en) 2005-12-21 2017-08-08 Mahle International Gmbh Method for the production of a connecting rod for an internal combustion engine
DE102006015586A1 (en) * 2006-04-04 2007-10-11 Mahle International Gmbh Bolts hubs of a piston for an internal combustion engine
US8011287B2 (en) 2006-04-04 2011-09-06 Mahle International Gmbh Pin bosses of a piston for an internal combustion engine
DE102006020795A1 (en) * 2006-05-03 2007-11-08 Mahle International Gmbh Method for applying a bearing surface onto a work piece using a prepared sheet material secured by adhesive
WO2008080543A1 (en) 2006-12-29 2008-07-10 Mahle International Gmbh Piston pin for a combustion engine and method for its manufacture
US7536945B2 (en) 2006-12-29 2009-05-26 Mahle Technology, Inc. Piston pin for a combustion engine and method for its manufacture
DE102007060473A1 (en) * 2007-12-14 2009-06-18 Mahle International Gmbh Bolts hub and provided therewith piston for an internal combustion engine
US8360026B2 (en) 2007-12-14 2013-01-29 Mahle International Gmbh Pin boss and piston provided with it, for an internal combustion engine

Also Published As

Publication number Publication date
JPH10505146A (en) 1998-05-19
JP3909085B2 (en) 2007-04-25
EP0779954A1 (en) 1997-06-25
DE59505005D1 (en) 1999-03-11
US5746169A (en) 1998-05-05
EP0779954B1 (en) 1999-01-27

Similar Documents

Publication Publication Date Title
EP0779954A1 (en) Light-metal piston for highly stressed internal combustion engines
EP1483493B1 (en) Multi-part, cooled piston for an internal combustion engine
EP0714485A1 (en) Light metal piston for highly stressed internal combustion engines
EP1922479B1 (en) Piston for an internal combustion engine
WO2008131739A1 (en) Piston for an internal combustion engine
EP2129899B1 (en) Piston for an internal combustion engine
EP0171825B1 (en) Light-metal piston for an internal-combustion engine
WO2007025622A1 (en) Piston comprising a circumferential radial recess located below an annular groove
DE10145589B4 (en) Piston for an internal combustion engine
DE2253868A1 (en) ONE-PIECE PISTON CONNECTED TO A CONNECTING ROD
DE19643778A1 (en) Lightweight pistons
EP1716355B1 (en) Piston pin bearing for pistons of an internal combustion engine
WO2017025608A1 (en) Piston for an internal combustion engine
WO2009006978A1 (en) Piston of an internal combustion engine with an increased inclination of the box walls of the piston
EP0549582B1 (en) Light-alloy plunger piston for spark-ignition engines
WO2003098078A1 (en) Piston-pin bearing for internal combustion engines
DE2212922B2 (en) Assembly of steel piston crown with aluminium piston skirt - uses connecting screwring with opposite hand threads
DE19908670C2 (en) Pistons for internal combustion engines
DE10101605B4 (en) Piston for internal combustion engines
DE3840841A1 (en) Light alloy piston for internal combustion engines
EP2002104B1 (en) Upper part of an assembled piston
DE3626436A1 (en) PISTON
DE3511557A1 (en) LIGHT METAL CONTROL PISTON
EP2053228A2 (en) Bolt boss of a piston
DE10007851A1 (en) Non-ferrous metal piston for diesel engine has recesses in interior shape of piston on pressure and counter-pressure sides

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1995928418

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 08776069

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 1995928418

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1995928418

Country of ref document: EP